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公开(公告)号：US07310302B2
公开(公告)日：2007-12-18
申请号：US11095978
申请日：2005-03-31
CPC分类号： H04L27/2655 , H04L27/2657 , H04L27/2662 , H04L27/2679
摘要： A synchronization technique computes, in the frequency domain, a differential-in-frequency function across a large number of OFDM tones, to develop robust estimates of time and frequency offset. The technique allows the system designer to directly trade performance in the presence of channel impairments against signal processing complexity.
摘要翻译： 同步技术在频域中计算跨大量OFDM音调的频差差分函数，以便开发鲁棒的时间和频率偏移估计。 该技术允许系统设计者在存在信道损伤的情况下直接交换性能，以抵抗信号处理的复杂性。
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公开(公告)号：US06954465B2
公开(公告)日：2005-10-11
申请号：US09791200
申请日：2001-02-22
CPC分类号： H04W72/082
摘要： This invention provides interference predictions, suitable for least interference dynamic channel assignment use or other frequency hopping uses by de-coupling the time slot assignment and the frequency hopping pattern assignment. In particular, a least interfered time slot is selected based on an aggregate interference measurement performed across an entire transmission band or a pre-specified range of frequencies in the transmission band. A user is assigned a least interfered time slot and provided an appropriate frequency hopping pattern.
摘要翻译： 本发明提供适合于通过解耦合时隙分配和跳频图案分配的最小干扰动态信道分配使用或其他跳频使用的干扰预测。 特别地，基于在整个传输频带或传输频带中的预定频率范围内执行的聚合干扰测量来选择最少干扰的时隙。 给用户分配最少的干扰时隙并提供适当的跳频模式。
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公开(公告)号：US06891792B1
公开(公告)日：2005-05-10
申请号：US09311562
申请日：1999-05-14
CPC分类号： H04L27/2655 , H04L27/2657 , H04L27/2662 , H04L27/2679
摘要： The synchronization technique invention uses inherent characteristics of the frequency domain representation of the data symbols. By computing a differential-in-frequency function across a large number of OFDM tones, robust estimates of time and frequency offset can be easily obtained. The technique also allows the system designer to directly trade performance in the presence of channel impairments against signal processing complexity. Analysis and simulation have shown good performance in the presence of noise and channel delay dispersion, impairments that are the harshest in a wireless environment.Prior techniques for OFDM synchronization have focussed on the time domain representation of the signal. Those that have recognized the translation of time and frequency offset to the frequency domain have not considered the systematic modification of the signal by the offsets.
摘要翻译： 同步技术发明使用数据符号的频域表示的固有特性。 通过计算大量OFDM音调的频率差分函数，可以容易地获得时间和频率偏移的鲁棒估计。 该技术还允许系统设计者在存在针对信号处理复杂性的信道损伤的情况下直接交换性能。 在存在噪声和信道延迟色散的情况下，分析和仿真显示出良好的性能，这在无线环境中是最严重的。 用于OFDM同步的现有技术集中在信号的时域表示上。 已经认识到对频域的时间和频率偏移的转换的那些没有考虑通过偏移对信号的系统修改。
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公开(公告)号：US07990839B2
公开(公告)日：2011-08-02
申请号：US11982121
申请日：2007-10-31
CPC分类号： H04L27/2655 , H04L27/2657 , H04L27/2662 , H04L27/2679
摘要： A receiver that employs inherent characteristics of frequency domain representation of the data symbols. By computing a differential-in-frequency function across a large number of OFDM tones, robust estimates of time and frequency offset are obtained. The obtained time and frequency estimates provide control to sampling and frequency offset elements that are interposed between the reliever input and subsequent receiver stages.
摘要翻译： 采用数据符号的频域表示的固有特性的接收机。 通过计算大量OFDM音调的频率差分函数，可获得时间和频率偏移的鲁棒估计。 获得的时间和频率估计提供对插入在缓冲器输入和后续接收器级之间的采样和频率偏移元件的控制。
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公开(公告)号：US07457259B2
公开(公告)日：2008-11-25
申请号：US11217045
申请日：2005-09-01
IPC分类号： H04B7/185
CPC分类号： H04W72/082
摘要： This invention provides interference predictions, suitable for least interference dynamic channel assignment use or other frequency hopping uses by de-coupling the time slot assignment and the frequency hopping pattern assignment. In particular, a least interfered time slot is selected based on an aggregate interference measurement performed across an entire transmission band or a pre-specified range of frequencies in the transmission band. A user is assigned a least interfered time slot and provided an appropriate frequency hopping pattern.
摘要翻译： 本发明提供适合于通过解耦合时隙分配和跳频图案分配的最小干扰动态信道分配使用或其他跳频使用的干扰预测。 特别地，基于在整个传输频带或传输频带中预先指定的频率范围内执行的聚合干扰测量来选择最少干扰的时隙。 给用户分配最少的干扰时隙并提供适当的跳频模式。
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公开(公告)号：US07180876B1
公开(公告)日：2007-02-20
申请号：US10145973
申请日：2002-05-14
IPC分类号： H04Q7/20
摘要： An access interface module includes a first network interface module for interfacing with a first access network and a second network interface module for interfacing with a second access network of a type that is different from the first network. The access module can further include a processor coupled to the first and second network interface modules and a device interface module coupled to the processor for interfacing with a host device.
摘要翻译： 访问接口模块包括用于与第一接入网络接口的第一网络接口模块和用于与不同于第一网络的类型的第二接入网络进行接口的第二网络接口模块。 访问模块还可以包括耦合到第一和第二网络接口模块的处理器和耦合到处理器的与主机设备接口的设备接口模块。
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7.发明授权公开(公告)号：US08046577B2
公开(公告)日：2011-10-25
申请号：US10317694
申请日：2002-12-12
IPC分类号： H04L29/06
CPC分类号： H04L63/061 , H04L61/2015 , H04L63/0869 , H04L63/1458
摘要： A protocol framework for a Secure IP Access (SIA) method, and supporting components deployed on IP hosts and IP networks. Using this method, an IP host can establish a secure data channel within an IP network over an insecure shared link while requesting IP address and networking configuration parameters from the IP network. A system administrator can implement strong access control against various attacks that an edge IP network may have to face, such as a denial-of-service attack that exhausts assignable IP addresses. This is a lightweight, scalable, and backward-compatible solution that can improve security performance for public and corporate LANs having open access such as wireless access points and Ethernet jacks.
摘要翻译： 用于安全IP接入（SIA）方法的协议框架，以及部署在IP主机和IP网络上的支持组件。 使用这种方法，IP主机可以通过不安全的共享链路在IP网络内建立安全数据通道，同时从IP网络请求IP地址和网络配置参数。 系统管理员可以对边缘IP网络可能必须面对的各种攻击实施强大的访问控制，例如耗尽可分配IP地址的拒绝服务攻击。 这是一个轻量级的，可扩展的和向后兼容的解决方案，可以提高具有开放访问权限的公共和公司LAN（如无线接入点和以太网插孔）的安全性能。
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